Daniele Tagliacozzo
A5045548595- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Scientific Measurement and Uncertainty Evaluation
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Mechanics and Biomechanics Studies
Roma Tre University
2023-2024
ABSTRACT We present an X-ray spectropolarimetric analysis of the bright Seyfert galaxy NGC 4151. The source has been observed with Imaging Polarimetry Explorer (IXPE) for 700 ks, complemented simultaneous XMM–Newton (50 ks) and NuSTAR (100 pointings. A polarization degree Π = 4.9 ± 1.1 per cent angle Ψ 86° 7° east north (68 confidence level) are measured in 2–8 keV energy range. shows that could be entirely due to reflection. Given low reflection flux IXPE band, this requires, however, a...
ABSTRACT We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging Polarimetry Explorer (IXPE) observed source for ∼500 ks, supported by XMM–Newton (∼60 ks) and NuSTAR (∼80 exposures. detect polarization in 2–8 keV band with 2.97σ confidence. report a degree 3.3 ± 1.1 per cent angle 78° 10° (errors are 1σ confidence). is consistent being aligned radio jet, albeit partially due to large uncertainties on position angle. jointly fit spectra from three...
ABSTRACT We report on the second observation of radio-quiet active galactic nucleus MCG-05-23-16 performed with Imaging X-ray Polarimetry Explorer (IXPE). The started 2022 November 6 for a net observing time 640 ks, and was partly simultaneous NuSTAR (86 ks). After combining these data those obtained in first IXPE pointing May (simultaneous XMM–Newton NuSTAR) we find 2–8 keV polarization degree Π = 1.6 ± 0.7 (at 68 per cent confidence level), which corresponds to an upper limit 3.2 99...
ABSTRACT MCG-5-23-16 is a Seyfert 1.9 galaxy at redshift z = 0.008 49. We analyse here the X-ray spectra obtained with Multi-Mirror (XMM)-Newton and Nuclear Spectroscopic Telescope Array (NuSTAR) data, which are first contemporaneous observations these two telescopes. Two reflection features, producing narrow core broad component of Fe Kα, clearly detected in data. The analysis iron line shows evidence truncated disc inner radius $R_{\rm in}=40^{+23}_{-16}$Rg an inclination $41^{+9}_{-10}$°....
Active galactic nuclei (AGNs), either radio-quiet or radio-loud, had never been observed in X-ray polarized light until the advent of Imaging Polarimetry Explorer (IXPE) end 2021. This satellite opened a new observational window for studying supermassive black holes and their complex environment. In this regard, AGNs are probably better targets than radio-loud objects to probe accretion processes due lack synchrotron emission from jets that can dilute signal central engine. Their relatively...
We report on the second observing program of active galactic nucleus NGC 4151 with simultaneous Imaging X-ray Polarimetry Explorer (IXPE; 750 ks), NuSTAR (∼60 XMM-Newton (∼75 and NICER (∼65 ks) pointings. is first Type-1 radio-quiet Seyfert galaxy constrained polarization properties for corona. Despite lower flux state in which source was re-observed resulting higher contribution constant reflection component IXPE energy band, our results are agreement detection. From polarimetric analysis,...
Active galactic nuclei (AGNs), either radio-quiet or radio-loud, had never been observed in X-ray polarized light until the advent of Imaging Polarimetry Explorer (IXPE [1]) end 2021. This satellite opened a new observational window for studying supermassive black holes and their complex environment. In this regard, AGNs are probably better targets than radio-loud objects to probe accretion processes, due lack synchrotron emission from jets that can dilute signal central engine. Their...
We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging Polarimetry Explorer (IXPE) observed source for ~500 ks, supported by XMM-Newton (~60 ks) and NuSTAR (~80 exposures. detect polarisation in 2-8 keV band with 2.97 sigma confidence. report a degree $3.3\pm1.1$ per cent angle $78\pm10$ degrees (errors are 1 confidence). is consistent being aligned radio jet, albeit partially due to large uncertainties on position angle. jointly fit spectra from...
We report on the second observation of radio-quiet active galactic nucleus (AGN) MCG-05-23-16 performed with Imaging X-ray Polarimetry Explorer (IXPE). The started 2022 November 6 for a net observing time 640 ks, and was partly simultaneous NuSTAR (86 ks). After combining these data those obtained in first IXPE pointing May (simultaneous XMM-Newton NuSTAR) we find 2-8 keV polarization degree $\Pi$ = 1.6 $\pm$ 0.7 (at 68 per cent confidence level), which corresponds to an upper limit 3.2 99...
We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy NGC4151. The source has been observed with Imaging Polarimetry Explorer (IXPE) for 700 ks, complemented simultaneous XMM-Newton (50 ks) and NuSTAR (100 pointings. A polarization degree $Π = 4.9 {\pm} 1.1 \%$ angle $Ψ= 86° 7°$ east north ($68\%$ confidence level) are measured in 2-8 keV energy range. shows that could be entirely due to reflection. Given low reflection flux IXPE band, this requires however a very...
MCG-5-23-16 is a Seyfert 1.9 galaxy at redshift z=0.00849. We analyse here the X-ray spectra obtained with XMM-Newton and NuSTAR data, which are first contemporaneous observations these two telescopes. Two reflection features, producing narrow core broad component of Fe K$\alpha$, clearly detected in data. The analysis iron line shows evidence truncated disc inner radius $R_{\rm in}=40^{+23}_{-16}$ $R_g$ an inclination $41^{+9}_{-10}$ $^\circ$. high quality allows us to measure energy...
We present the results of X-ray polarimetric analyses performed on unobscured radio-quiet Active Galactic Nuclei (AGN) with Imaging Polarimetry Explorer (IXPE), simultaneous XMM-Newton and NuSTAR data. The synergy these instruments is crucial to constrain corona physical properties assess its geometry. In first two years operation, three AGN have been observed: significant polarization was detected for NGC 4151 (4.9$\pm$1.1 per cent) IC 4329A (albeit less confidence, 3.3$\pm$1.1 cent),...